Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Income Tax [Line Items]
Income before income taxes	$ 15,147,000	$ 8,695,000	$ 54,798,000	$ 35,308,000
Income tax expense	$ 5,268,000	$ 3,248,000	$ 19,724,000	$ 13,256,000
Effective tax rate	34.80%	37.40%	36.00%	37.50%
Accrual for uncertain tax, interest or penalties	$ 0		$ 0
Minimum [Member]
Income Tax [Line Items]
State income taxes, statute of limitations period (years)			3 years
Maximum [Member]
Income Tax [Line Items]
State income taxes, statute of limitations period (years)			4 years